Onkilahden Toimintapuisto is a city-run outdoor playground area on the shore of Onkilahti in Vaasa, offering varied play options within walking distance of the city centre. The park features colourful climbing structures, slides, swings, sandboxes and a ship-themed water play area. It is best suited to children aged 1–10, with a soft safety surface covering the ground. Benches around the area and open lawns make it a comfortable spot for parents and picnics. Use is free, and the Onkilahti shoreline path offers a natural continuation for a walk. Parking is available nearby and the city centre is a short walk away.